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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include "util.h"
#include "log.h"
#include "journal-file.h"
#include "journal-verify.h"
#include "journal-authenticate.h"
#define N_ENTRIES 6000
#define RANDOM_RANGE 77
static void bit_toggle(const char *fn, uint64_t p) {
uint8_t b;
ssize_t r;
int fd;
fd = open(fn, O_RDWR|O_CLOEXEC);
assert(fd >= 0);
r = pread(fd, &b, 1, p/8);
assert(r == 1);
b ^= 1 << (p % 8);
r = pwrite(fd, &b, 1, p/8);
assert(r == 1);
close_nointr_nofail(fd);
}
static int raw_verify(const char *fn, const char *verification_key) {
JournalFile *f;
int r;
r = journal_file_open(fn, O_RDONLY, 0666, true, !!verification_key, NULL, NULL, NULL, &f);
if (r < 0)
return r;
r = journal_file_verify(f, verification_key, NULL, NULL, NULL, false);
journal_file_close(f);
return r;
}
int main(int argc, char *argv[]) {
char t[] = "/tmp/journal-XXXXXX";
unsigned n;
JournalFile *f;
const char *verification_key = argv[1];
usec_t from = 0, to = 0, total = 0;
char a[FORMAT_TIMESTAMP_MAX];
char b[FORMAT_TIMESTAMP_MAX];
char c[FORMAT_TIMESPAN_MAX];
struct stat st;
uint64_t p;
/* journal_file_open requires a valid machine id */
if (access("/etc/machine-id", F_OK) != 0)
return EXIT_TEST_SKIP;
log_set_max_level(LOG_DEBUG);
assert_se(mkdtemp(t));
assert_se(chdir(t) >= 0);
log_info("Generating...");
assert_se(journal_file_open("test.journal", O_RDWR|O_CREAT, 0666, true, !!verification_key, NULL, NULL, NULL, &f) == 0);
for (n = 0; n < N_ENTRIES; n++) {
struct iovec iovec;
struct dual_timestamp ts;
char *test;
dual_timestamp_get(&ts);
assert_se(asprintf(&test, "RANDOM=%lu", random() % RANDOM_RANGE));
iovec.iov_base = (void*) test;
iovec.iov_len = strlen(test);
assert_se(journal_file_append_entry(f, &ts, &iovec, 1, NULL, NULL, NULL) == 0);
free(test);
}
journal_file_close(f);
log_info("Verifying...");
assert_se(journal_file_open("test.journal", O_RDONLY, 0666, true, !!verification_key, NULL, NULL, NULL, &f) == 0);
/* journal_file_print_header(f); */
journal_file_dump(f);
assert_se(journal_file_verify(f, verification_key, &from, &to, &total, true) >= 0);
if (verification_key && JOURNAL_HEADER_SEALED(f->header)) {
log_info("=> Validated from %s to %s, %s missing",
format_timestamp(a, sizeof(a), from),
format_timestamp(b, sizeof(b), to),
format_timespan(c, sizeof(c), total > to ? total - to : 0, 0));
}
journal_file_close(f);
if (verification_key) {
log_info("Toggling bits...");
assert_se(stat("test.journal", &st) >= 0);
for (p = 38448*8+0; p < ((uint64_t) st.st_size * 8); p ++) {
bit_toggle("test.journal", p);
log_info("[ %"PRIu64"+%"PRIu64"]", p / 8, p % 8);
if (raw_verify("test.journal", verification_key) >= 0)
log_notice(ANSI_HIGHLIGHT_RED_ON ">>>> %"PRIu64" (bit %"PRIu64") can be toggled without detection." ANSI_HIGHLIGHT_OFF, p / 8, p % 8);
bit_toggle("test.journal", p);
}
}
log_info("Exiting...");
assert_se(rm_rf_dangerous(t, false, true, false) >= 0);
return 0;
}
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